Loading skip for concrete mixers



May 1927' s. SHAFER, JR

LOADING SKIP FOR CONCRETE MIXERS Filed May 15. 1926 Patented May 24!, 1927.

SAMUEL SHAFER,-.JR., OF'MILWAUKEE, WISCONSIN, ,nssmnon reclaim BE T-0019i; 1', IPANY, or MILWAUKEE,- wrsconsm,.;A-CORPORATON or WISCONSIN.

oAnI nGsKIP non Application filed' lvlayfi I iscustomary in the building'of con crete roads to charge the'concretepaving mixer machine that is used with measured batches of concrete aggregate. These 5 batches are commonly conveyed to thelmix} ing machine in batch boxes, each 'holding a single measured batch of ggre ate, which c are transported" by trucks or? on industrial railway cars from thejmeasuring plane where the sand andstone'toj'be used in the road construction are stored in" bulk, and

where frequently the cement also? stored. However, it is sometimes found desirable to stock the 'cement to beused' in conveniently placed piles along the course of the work, and to dump into the loadingskip of t'he mixing machine after each batch of "coarse aggregate of sand stone has. been charged into the same,as much cement as is r required, taken from oneioffsuch piles: This latterprocedure is'follofwed where there is so muchmoi'sture' in the coarse aggregate as V to cause the 'cement, if placed in the batch box'at the measuring plant, to take an initial I as'set before'it is delivered toand treated in the mixing machine. This is also" desirahl e where, dueto high wind'sythere'i's thel'liability of considerableloss of cement while being transported withthe coarse aggregate.

WVhenthe cement is charged into the power loading skip separately from the coarse aggregate'I have found it 'of advan' gate until the moment" of discharging the load from the skip into the mixer; because when the cement isjdu'mped directly into the loading section of the skip along with the I coarse aggregate, or upon" the top of'thelatter,.1nore or less of the cement sticks to the 40 sides of the skip, thus-"entailing loss, and

additional labortofikeep the skip 'clean and the inner walls thereof smooth, so that the charge will slide freely into the "mixer-when the skip is elevated.

My invention, has struct'i a'fskip; so 1 that the cement of the charge is ke t separate from the coarse aggregate unti" the moment of delivery' of the charge to the"mi'xer,as wil'lbe described. 7 While my invention is'parti'cularly useful v in connection with the loading-skip forconcrete pavingmachines it will be readily. seen crete mixersof other types r that'it maybe used in connectionwith confor its object a Gen.

oononnrnimrxnns.

1926.} Serial no. 108,958.

In the accompanying drzwvings F'gure l is a side elevation of ipower operated loading or charging skip for a crete mixer to which my inventionlisap l e P f h e sid wallof theiskip c Q f. r so being broken away.

f ng'to the drawings,

loading skip of well. known" cginstructiori.{ It 1s, arranged to be pivotallyjconnectjed;

at 2, to the frame of a concrete mixer in' con imarc with which it istuse'di 3jiIidi 'cates" 1 one of the cables by .Which the skipisioperg [The skip isifor "ed with spout j$eCtiOI14:,' p

ated in a well known manner. 7

through whichthe aggregate of solid:rnate-;" I rial which enters into the fqrmanon of a batch-of concrete is delivered to: the e tate drum of the payer or other mixing Lina-j chine, and with an ope'nsect1on;-6 having sides flaring toward. thelre'ar; into which i the coarseaggregate charged, fro-m tbatch" boxes, trucks, wheel; barrows, "or". otherwise; 1 5

lVhenthe skip is in its lowered positionyas representedflin'Figxl; the section 6 rests f to f cilitate its. being upon the groundv loaded.

5 indicates acoveri for'the i of the spout section of: the skipi'there'ar por-l 'tion ofthe spout and the loading section fi tage to keep'it separate. from such aggre'-=' bei ng' open or uncovered. Between the spout and the loading sections of the'skip, prefer-' I ably at the baseor rear ofthe spout, Ifari range a movable partition separatin'g'th'ese two sections. This partition is preferably formed of three parts, designated respectived upon. ashaft 21 that extendsfrom side to sideo fth'e skip,the ends of the shaft-being shaped to form trnnnions that are m'ounted' skip 'nearthe upper edges thereof 'at about the line Where thejspoutf and loading sections merge into each other. The central section inbearings26 attached to the sideslbf the 18' of the'part'ition is preferably rectangular and. is'secured fast to the shaft 21; The

outer sections 19and 20 o'fthepartition are Pivotally united; 2 .23; p t vely, with t the cross-shaft 21 'near their upperouter corners, and have" their inner edges overlapping the edges ofthe central.'section-18,to

' ""thegpivotshaft 21-;which I utilize as a recarried by the section 18 and extending I I "through slots-14L in the end sections of the partition, these slots" beingon shortjarcs struck from the pivots 23, respectively; The outer edges of the end sections of the partition are inclined-relative to the other edges Iof such sections, as-represent'ed in F1gs.f2 and 3,'so that the partition will conform to.

the tapering or inclined walls of the spout' section of theskip; Q'Zindicatesstops with which the outer edges of the sections the partitiongengage when the partition is in its lower or-normal position, and whichserve to h old the partition in this position, asirep;

resented in Figs. 1 and 2.

a Itw-ill be seen that the partition sep iae ing the' loading seot'io'n6 from the spout sec-' tionof the skip serves to form a chamber; at

the base of the spout. and. below the opening 7 between the lower edge of thercover 5 and V "ceptaclefor the cement; This arrangement insurestha-t the coarse aggregate anclfthe cement of the charge shallfhe maintained entirely separate i'rom each other until the 7 skip; ls 'tl1ted to. 'dischargeinto the miiing v machine, and' frenders' it entirely practical 4 Efor the two sections of the skip the cement sect io ri'and the, coarse aggregate sectiontof ice-simultaneously loadedjor' either, to be loaded :in'advanceof the other as maybe I fouhd. most desirable under the .circum-:

sta ces i e If a ea-1a"ana ram assenormaipes ition of thepartitioniis. that represented in i'ullfline's in Figs. 1 aud t}, that iselowered 11 with its vedge resting upon the stops 27. When the skip is raised to discharge,the

cement slides forward throughthe spout, and-the coarse aggregate moves forwardly, gradually raising the partition to the positionindicated'in dottedli'nesfin Figfql, It willbe-seen that the sand and stone constia tuting thecoarse aggregate do not comeinto engagement withthe upper surfaces of the partition, andthatthe cement does not come into, engagement; with thej lower surfaces thereof. From this it follows that those 7 portions of the partition with which the cement comes in contact are never. wet by the I coarse aggregate,no matter what may be its condltionas to the water content wh ch' it may I carry.

{It willbe seen that the enter edges of the sections-19 and 20 of the partition engage,

when the partition is in its lowernormal position, with the walls of the spout ata place where the spout is wider .thanthat engaged 'bylthe' partitionwhen lifted to permit the passage of the coarse aggregate; In Fig. 3' of the drawings the positions. that the parts of the partition occupy-when in their lower normal positions is represented in- 'full'lines,

; r a 'andthepositionsthey-occupy when the partition is raised is represented by dotted lines.

This view shoWs that in moving from one'po sitio'n to'the other the outer'sections of the partition turn'about their-pivots '23;',but in so doing the'outer sections'19 and 20* ofthe partition"maintain engagement at all times the spout. 1

with theinnersurfaces-ofthe sidewalls of claim is 1.- In combination with a charging skip for concretemixers formed with ya spout section and a" large loading section tor the coarse aggregate, a partitionseparating the said two sections; and fforming a chamber for the cement at the base of thespout section," the p artition being movabl V to permit the-coarse aggregate 'istilted to discharge..;-

for e npret ixers formed with' a spout section and a. l'argeiloadingsectionfor the d at i Sil PiP dge and -mange to m a; P sition separating -Pri' SZ w n the sk p v thefitwoisectionsio'ffthe'skip; and being ran ed to move topermitjjthe c arse a gg'rer I sti tto P S when the skip'his'tilted m Charge, r V

, 3.; The combination a charging for concrete mix 'elfsfform ed 'witha tapering spout section and jaflarge loadingseetion for the coarse aggregate; of a partiti'onlsep a rating the two sections and forminga 'oh'am her for. the cement at the base of the spout section the partitionibeing: movable to: per

mit the? coarse aggregatefto pass when the skip is tilted to dis'cha'rge, and formed; cr-

separate seetionsjmovahle relative to each I 10 the'walls of. the spout as it'movesthereinJ 7 Thecombination with a' 'chargingiskip 5 other to permit the partition tofconformto for concretemixers formed cw'ithla tapering' V spout section anda large loading section'for the coarse-a re ate; of a partition separat-' 'ing the said two sections, p-ivot ally supported at its upper edge in thespoutfand formed of separate sections;"th e partition, being arrangedito turn on its 'pivots'fto permit the, passage of the coarse-aggregate when the skip is tilted to discharge and the isections of the partitionbein'g movable" relative to each other to permit; thefpartition fto. cone form to the spout asfit swingsfon1its;pivot, p r forconcrete mixers fo'rmedTwith ia' spout 5. In combination with a charging skip section andalarge open ohargingsection' for thecoarse' aggregate, a cover forthefor- Wardpart 'of-the spout section, aipivoted partition separating the two sections of the in rear of the rear edge of the coverifo'r the spout"section,"whereby isfformeda chamberj- V for theg'ceme'nt at the base OfthespOutsec-E tion that *ope from above a'nsigis, s paskip, thefpivotal line ,of the'partition being m; i r

rated from the loading section, the parti-,

tion .being movable on its pivots to permit the coarse aggregate to pass when the skip istilted to discharge.

6. The combination with a charging skip for concrete mixers formed with a spout section and a loadingv section for the coarse aggregation, of a partition separating the tWo sections and comprisinga pivot shaft extending across the skip at the base of the "spout, a. central partition part secured vfast tothe shaft and side partition partspivotally'eonnected With the shaftat their upper e outer corners and arranged along. their inner edges to loverlie the central part'of the partition, the outer edges of the side parts of the partition beingin'engagem'ent Witl'ithe side Walls of the spout section, uniting the side-sections and the central section of the partition and limiting the move-"120' ments of the itormer relative to the latter.

SAMUEL SHAFERQJR.

and means for 

